Structural Evolution of the Rock Creek Gold Deposit, Seward Peninsula, Alaska

2009 ◽  
Vol 104 (7) ◽  
pp. 945-960 ◽  
Author(s):  
B. R. Otto ◽  
J. Piekenbrock ◽  
J. Odden
Keyword(s):  
Gold Deposit ◽  
Structural Evolution ◽  
Seward Peninsula

Structural Evolution of the Rock Creek Gold Deposit, Seward Peninsula, Alaska

2009 ◽  
Vol 104 (7) ◽  
pp. 945-960 ◽  
Author(s):  
B. R. Otto ◽  
J. Piekenbrock ◽  
J. Odden
Keyword(s):  
Gold Deposit ◽  
Structural Evolution ◽  
Seward Peninsula

Structural evolution of the Hemlo greenstone belt in the vicinity of the world-class Hemlo gold deposit

2003 ◽  
Vol 40 (3) ◽  
pp. 395-430 ◽  
Author(s):  
T L Muir
Keyword(s):  
Gold Deposit ◽  
Greenstone Belt ◽  
Structural Evolution ◽  
Small Scale ◽  
Structural Elements ◽  
Shear Sense ◽  
History Of ◽  
Brittle Fractures ◽  
World Class ◽  
Dextral Shear

A complex history of volcano-sedimentary deposition, polyphase strain, multiple intrusive events, and various stages of porphyroblastesis is indicated for the Hemlo gold deposit area within the Hemlo greenstone belt. Structural elements can be assigned to at least six stages of development (D1–D6). D1 generated small-scale folds and low-angle faults (thrusts?) with no planar fabric, except within strain aureoles around the earliest intrusions. D2 was a progressive event resulting from northeast-directed compression, which generated regional, predominantly S-shaped folds (early D2); penetrative planar and linear fabrics, overturned stratigraphy, and formation of an inflection in the strike of the greenstone belt (mid-D2); and development of high-strain zones with dominant sinistral and local dextral shear sense (late D2). D3 was a distinctly separate progressive event resulting from northwest-directed transpression, which generated variably penetrative east- to northeast-striking foliation (S3), ductile dextral shear fabrics, and small-scale Z-shaped folds (early D3), followed by brittle–ductile to brittle development of cataclasite and pseudotachylite in layer-parallel zones (late D3). D4 resulted in contractional kinks and brittle fractures, locally in conjugate sets. D5 and D6 are represented by brittle to brittle–ductile faults, which overprint Paleoproterozoic and Mesoproterozoic dikes, respectively. Four granitoid magmatic events span the interval 2720–2677 Ma, with emplacement mainly during D2, between ca. 2690 and ca. 2684 Ma. A protracted period of regional medium-grade metamorphism likely spanned the D2–D3 stages. The Hemlo gold deposit was emplaced during mid-D2 and was largely controlled by D2 structural elements and competency contrast between rock units.

scholarly journals Geology, structural evolution, and hydrothermal alteration of the Island gold deposit, Michipicoten greenstone belt, Ontario

2020 ◽  
Author(s):  
T J Ciufo ◽  
K Jellicoe ◽  
C Yakymchuk ◽  
S Lin ◽  
P Mercier-Langevin ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Hydrothermal Alteration ◽  
Greenstone Belt ◽  
Structural Evolution

GEOLOGY AND STRUCTURAL EVOLUTION OF THE SAN FRANCISCO OROGENIC GOLD DEPOSIT, SONORA, MEXICO

2019 ◽  
Author(s):  
Ana Liseth Gonzalez-Fonseca ◽  
◽  
Ricardo Vega-Granillo ◽  
Jesus Roberto Vidal Solano
Keyword(s):  
Gold Deposit ◽  
San Francisco ◽  
Structural Evolution ◽  
Orogenic Gold ◽  
Orogenic Gold Deposit

Geology and structural evolution of the Muruntau gold deposit, Kyzylkum Desert, Uzbekistan

1998 ◽  
Vol 6 (3-4) ◽  
pp. 177-180
Author(s):  
Lawrence J. Drew ◽  
Byron B. Berger ◽  
Namik K. Kurbanov
Keyword(s):  
Gold Deposit ◽  
Structural Evolution ◽  
Kyzylkum Desert
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